api-graphql-mercurius SKILL.md skillA
api-graphql-mercurius from agents-inc/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add agents-inc/skills/api-graphql-mercurius@git:20261016.afd0e14Pins git:20261016.afd0e14 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- agents-inc/skills
- Path
src/skills/api-graphql-mercurius/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261016.afd0e14, committed Oct 16, 2026
- First version recorded
- Jul 9, 2026
- Size
- 15,843 bytes
- Repository stars
- 26
- License
- MIT
GraphQL server for Fastify with Mercurius — loaders, subscriptions, federation, JIT compilation.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# GraphQL with Mercurius
> **Quick Guide:** Use Mercurius as a Fastify plugin for GraphQL APIs with built-in loader batching (solves N+1), JIT query compilation, subscriptions via WebSocket, and federation support. Register with `app.register(mercurius, { schema, resolvers, loaders })`. Loaders are Mercurius's killer feature: define them per-type to batch field resolution automatically. Use `jit: 1` to enable query compilation for production performance.
---
<critical_requirements>
## CRITICAL: Before Using This Skill
**(You MUST define loaders for any field that fetches related data — loaders solve the N+1 problem automatically through batching)**
**(You MUST use named constants for all numeric values — JIT thresholds, query depth limits, port numbers)**
**(You MUST return an array from loaders matching the exact length and order of the `queries` parameter)**
**(You MUST use `fastify.graphql.pubsub.publish()` inside mutations to trigger subscriptions — not external pubsub directly)**
</critical_requirements>
---
…Read the whole file at its exact version.
How to install
mdr add agents-inc/skills/api-graphql-mercurius@sha256:4634296aa9f41723The line at the top of this page pins the label git:20261016.afd0e14, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ddq2bazoz77o3wkk)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jul 9, 2026 and Oct 16, 2026, about one every 99 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261016.afd0e14 latest | 2026-10-16 | afd0e14 | 15,843 B | A | view · diff |
| git:20260709.a28d77d | 2026-07-09 | a28d77d | 16,042 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (15843 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
agents-inc/skills · 26 stars · license MIT · pushed 2026-10-27 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ddq2bazoz77o3wkk GET https://markdownregistry.com/api/v1/resolve?ref=agents-inc/skills/api-graphql-mercurius GET https://markdownregistry.com/api/v1/blob/4634296aa9f417234272d66e1021afd68a9e2bf9d8c04da8f3487644f3e87763
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.